Line 13 x 9 x 2-inch baking pan with nonstick foil.Advertisement
Combine peanut butter chips and butter in large glass bowl. Microwave on 50% power for 30 seconds. Stir. Return to microwave; heat on HIGH for 1 minute and 30 seconds, stirring every 30 seconds. Whisk in condensed milk.
Gradually stir in crumbs and the 1/2 cup of chopped peanuts (use hands, if necessary, to mix well). Pat the mixture evenly into the prepared pan. Refrigerate until firm, about 30 minutes.
Microwave chocolate chips in a medium-size microwave-safe bowl on HIGH for 1 minute. Stir until smooth; microwave in additional 15-second increments, if necessary. Spread over top of peanut mixture. Sprinkle with remaining 1 cup nuts. Let stand at room temperature until firm, about 1 hour. Cut into 48 squares.